*{
    margin: 0;
    padding: 0;
}
.main1{
  background-image: url("img/1.png");
    background-position:-130px -147px;
    width: 100px;
    height: 25px;
    float: left;
    font-size: 14px;
    text-align: center;
    line-height: 25px;
    z-index: 30;
}
ul li{
    display: inline-block;
}
.main2{
   float: left;
    margin-left: -15px;
    background-image: url("img/1.png");
    background-position:-137px -147px;
    width: 93px;
    height: 25px;
    text-align: center;
    line-height: 25px;
    font-size: 14px;
    z-index:20;
}
.main3{
    float: left;
    margin-left: -15px;
    background-image: url("img/1.png");
    background-position:-138px -147px;
    width: 93px;
    height: 25px;
    text-align: center;
    line-height: 25px;
    font-size: 14px;
    z-index: 10;
}
.main1:hover{
    background-image: url("img/1.png");
    background-position:-128px -121px;

}
.main2:hover{
    background-image: url("img/1.png");
    background-position:-137px -121px;

}
.main3:hover{
    background-image: url("img/1.png");
    background-position:-138px -123px;

}


